package com.it.stringdemo;

import java.util.Scanner;

public class stringdome4 {
    public static void main(String[] args) {
        //键盘录入一个字符串，统计该字符串中大写字母字符，小写字母字符，数字字符出现的次数
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个字符串：");
        String str = sc.next();
        //统计
        int bigCount = 0;
        int smallCount = 0;
        int numberCount = 0;
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (c>='a' && c<='z') {
                smallCount++;
            }else if (c>='A' && c<='Z') {
                bigCount++;
            }else if (c>='0' && c<='9') {
                numberCount++;
            }
        }
        System.out.println("大写字母有"+bigCount+"小写字母"+smallCount+"数字字母有"+numberCount);
    }
}
